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Old 10-14-2014, 03:04 PM   #3
DavidM
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City: Litchfield, Ct
Join Date: Aug 2012
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The cylindrical zinc is for the engine's heat exchanger.

Underwater you will probably have an egg shaped on zinc on the prop shaft, a round zinc on the rudder if it is bronze and sometimes a big rectangular or hexagonal zinc on the transom.

Boatzincs.com is the place to buy them.

David
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